we've had a lot of opportunity to sit around and talk with mrs. obama. the thing that keeps coming away from those conversations is how normal. the kids have sleepovers, they go to the movies. she calls friends, really now, to say how are the girls? are they the same? she so much wants to make sure that the white house bubble doesn't change them. by all accounts it doesn't seem as if it has. >> really great parenting. that's obvious as well. we see the girls on their iphones. that brings up the question of how they handle social media. this is something that kids of their age, 14 and 11, are certainly -- that is their new life. they're all about social media. do the obamas allow them to look and participate in facebook? >> no to facebook and no to twitter, purely really on a security issue, about being the white house children. but mrs. obama says they have conversations about it, that the girls are aware everybody has a cell phone, that they can't go off on someone and have a bratty moment. someone can take a picture of that and then that could define t